~ubuntu-branches/ubuntu/raring/extplorer/raring-proposed

<?php

// ensure this file is being included by a parent file

if( !defined( '_JEXEC' ) && !defined( '_VALID_MOS' ) ) die( 'Restricted access' );

# Author: Vincent JAULIN

# Copyright: Keyphrene.com 2008 @ all rights reserved

 

// function to parse the http auth header

function http_digest_parse($txt)

{

        // protect against missing data

        $needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);

        $data = array();

 

        preg_match_all('@(\w+)=([\'"]?)([%a-zA-Z0-9=./\_-]+)\2@', $txt, $matches, PREG_SET_ORDER);

 

        foreach ($matches as $m) {

                $data[$m[1]] = $m[3];

                unset($needed_parts[$m[1]]);

        }

 

        return $needed_parts ? false : $data;

}

 

function AuthenticationDigestHTTP($realm, $users, $phpcgi=0) {

        if (empty($_SERVER['PHP_AUTH_DIGEST']) && empty($_SERVER['REDIRECT_REMOTE_USER'])){

                header('HTTP/1.1 401 Unauthorized');

                header('WWW-Authenticate: Digest realm="'.$realm.'" qop="auth" nonce="'.uniqid(rand(), true).'" opaque="'.md5($realm).'"');

                die('401 Unauthorized');

        }

        // analyze the PHP_AUTH_DIGEST variable

        $auth = $_SERVER['PHP_AUTH_DIGEST'];

        if ($phpcgi == 1) {

                $auth = $_SERVER['REDIRECT_REMOTE_USER'];

        }

        $data = http_digest_parse($auth);

        if (!array_key_exists($data['username'], $users)) {

                header('HTTP/1.1 401 Unauthorized');

                die('401 Unauthorized');

        }

 

        // generate the valid response

        $A1 = md5($data['username'] . ':' . $realm . ':' . $users[$data['username']]);

        $A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);

        $valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);

 

        if ($data['response'] != $valid_response) {

                header('HTTP/1.1 401 Unauthorized');

                die('401 Unauthorized');

        }

        return TRUE;

}

 

function AuthenticationBasicHTTP($realm, $users, $phpcgi=0) {

 

        if (empty($_SERVER['PHP_AUTH_USER']) && empty($_SERVER['REDIRECT_REMOTE_USER'])) {

                header('WWW-Authenticate: Basic realm="'.$realm.'"');

                header('HTTP/1.0 401 Unauthorized');

                die('401 Unauthorized');

        }

 

        $user = $_SERVER['PHP_AUTH_USER'];

        if ($phpcgi == 1) {

                $matches = explode(' ', $_SERVER['REDIRECT_REMOTE_USER']);

                list($name, $password) = explode(':', base64_decode($matches[1]));

                $_SERVER['PHP_AUTH_USER'] = $user = strip_tags($name);

                $_SERVER['PHP_AUTH_PW']    = strip_tags($password);

        }

 

        if (array_key_exists($user, $users) && $users[$user] == extEncodePassword($_SERVER['PHP_AUTH_PW']) ){

                activate_user($user, extEncodePassword($_SERVER['PHP_AUTH_PW']));

                return TRUE;

        }

 

        header('WWW-Authenticate: Basic realm="'.$realm.'"');

        header('HTTP/1.0 401 Unauthorized');

        die('401 Unauthorized');

        return FALSE;

}

?>